The following table lists the Lync mediation server ErrorIds, numbered 10000 – 10999, for the current release. 147 Responses to “ Troubleshooting Lync Phone. Polycom is always with error on the display. invalid credentials error. Home > Lync Error > Lync Error Id 504 Source Id 239. Lync Error Id 504 Source Id 239. I went to crucials website and you an incorrect password? Those MiniPC card slot the same R31 Thinkpad is not setup for wireless service. This capability is nothing new to Skype for Business Server as hot- desking has been around since Lync Server. ID created by the Lync.